"When you master PhotoReading, you can drop the time down. How far? It depends on many factors."

Like what factors? How far can it [potentially] be dropped down? I know that you are probably hesitant to make hard and fast generalizations but I just would like to have an idea of what can be done with the system once you have invested a lot of time and energy (and $).

Also have you photoread a book like a biochem book in the past? How long did it take?